Tham khảo Cierva C.30

Ghi chú

Tài liệu

  • Jackson, A.J. British Civil Aircraft 1919-72: Volume II. London: Putnam and Company, 1973. ISBN 0-85177-813-5
  • Munson, Kenneth. Helicopters and other Rotorcraft since 1907 (Blandford Colour Series). London: Associate R.Ae.S., 1973. ISBN 0-7137-0610-4.
  • Pacco, John. "Cierva C-30A" Belgisch Leger/Armee Belge: Het militair Vliegwezen/l'Aeronautique militaire 1930-1940. Artselaar, Belgium, 2003, p. 92. ISBN 90-801136-6-2.
  • Smith, J. Richard. "C 30 Heuschrecke" Focke-Wulf, an Aircraft Album. London, Ian Allan, 1973. ISBN 0-7110-0425-0.
  • Thetford, Owen. Aircraft of the Không quân Hoàng gia 1919-57. London: Putnam and Company, 1957.
  • The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.